Mono-azodyestuffs



Patented Dec. 29, 1 936.

UNITED STATES PATENT FFIE MONO-AZODYESTUFFS Richard Fleischhauer,

Fechenheim,

Frankfort-on-the-Main- Germany, assignor to General Aniline Works, Inc., New York, N. Y., a corporation of Delaware No Drawing.

Application July 6, 1935, Serial N0.'30,159. In Germany July 14, 1934 4 Claims.

My present invention relates to monoazodyestuffs more particularly to those of the general formula:

SOzZ

SO3H wherein X represents hydrogen or an alkyl, aralkyl, hexahydrophenyl or phenyl radicle, Y the methyl or phenyl radicle and Z represents OH or the grouping wherein X, Y, and Z have the aforesaid signification, with 2-amino-8-hydroxynaphthalene-6-sulfonic acid. These amines may be prepared as follows: Either the 1-chloro-4nitrobenzene-2-sulfonic acid is condensed with aliphatic, hydroaromatic or aromatic amines and the formed condensation products are acylated and reduced, or the 1-chloro-4-nitrobenzene-2-sulfonicacid chloride is decomposed with amines, the chlorine atom is replaced by an amino or substituted amino group for instance by treating with the amine under superatmospheric pressure and the condensation product is acylated-and finally reduced.

In order to further illustrate my invention the following examples are given, the parts being by weight and all temperatures in centigrade degrees; but I wish it, however, to be understood that my invention is not limited to the examples 50 given, nor to the exact conditions stated therein.

Example 1 37.6 parts of l-aminol-acetyl-N-cyclohexylamino-benzene-B-sulfom'c acid are dissolved in 55 water with the addition of a sufiicient quantity of sodium carbonate and while cooling with ice they are diazotized by means of hydrochloric acid and 6.9 parts of sodium nitrite. Then the formed diazocompound is combined in a Weakly mineral acid medium with a suspension of 24 parts of 2-amino-8-hydroxynaphthalene-6-sulfonic acid. After stirring for some hours the formed dyestuff is isolated after the addition of sodium ace tate or sodium carbonate. It corresponds to the formula:

Hg Hz 1 1 i l; 1 solri H3000 SOQH It is when dry a reddish brown Water soluble poW- der and dyes wool and silk from an acid bath bright scarlet shades of a good fastness to light, washing and perspiration.

Very similar dyestuffs are obtained by using for instance as diazocomponent the diazocompound of 1-amino-4-ace-tyl-N-n-butylaminobenzene-3 sulfonic acid, l-amino-4-acetylN-phenyl-aminobenzene-3-sulfonic-acid, l aminol-acetyl N methylaminobenzene-3-sulfonic acid and l-amino 4 acetyl-N-benzylamino-benzene-3-su1fonic acid, l-amino-4-methoxyacetyl-N-methylamin0- benzene-3-sulfonic-acid and 1-ami11o-4-carbethoxy-N-methyl-amino-benzene-3-sulfonic acid.

Example 2 The diazocompound of 32 parts of l-aminolacetyl-N-ethyl-aminobenzene-3-sulfonic acid is combined in a mineral acid medium with a suspension of 24 parts of 2-amino8hydroxy-naphthalene-G-sulfonic acid. When the combination has been finished the dyestuif is isolated by adding common salt to the reaction mass. It corresponds to the formula:

H COO a g 0311 HZN.

It is when dry a reddish brown water soluble powder and dyes W001 from an acid bath bright scarlet shades of a good fastness to light and a good levelling power.

Similar dyestufis are obtained by using as diazocomponent the diazo compounds of 1-amino-4- benzoyl-N-methylamino benzene-3-sulfonic acid and 1-amino-5-methyl-4-acetyl-N-methylaminobenzene-3-sulfonic acid.

Example 3 When combining 24 parts of 2-amino-8-hydroxy-naphthalene-6-sulfonic acid with the diazocompound of 29.4 parts of 1-amino-4-acetylaminobenzene-B-sulfonic acid, the formed monoazodyestuif of the formula:

H COG OaH is when dry a reddish brown water soluble powder and dyes the animal fibers from an acid bath bright yellowish red shades.

Example 4 The diazocompound of 25.! parts of 1-amino-4- acetyl-N-methyl aminobenzene-Ii-sulfonic acid methylamide is combined in an acid medium with a suspension of 24 parts of 2-amino-8-hydroxynaphthalene-G-sulfonic acid. The formed dyestufi of the formula:

SOaN

Example 5 The diazocompound of 36.5 parts of 1-amino-4- acetyl-N-methylaminobenzene-3 sulfonic acidmethyl-amide-ethanesulfonic acid is combined in an acid medium with a suspension of 24 parts of 2-amino-B-hydroxynaphthalene-fi-sulfonic acid. The formed dyestuif of the formula:

is when dry a reddish brown water-soluble powder and dyes the animal fibers yellowish shades of a good fastness to light.

Similar dyestuffs are obtained when using as diazocomponent for instance the diazocompounds of l-aminol-acyl N alkylamino-benzene 3 sulfonic acid-amido-ethane-sulfonic acids or -butylamido-ethane-sulfonic acids or corresponding amido acetic acids for instance one of the formula:

alkyl N NH1 acyl alkyl 1 O zN 0 Hz-C 0 OH I claim: 1. Monoazodyestuffs of the general formula:

wherein X represents hydrogen or an alkyl, aralkyl, hexahydrophenyl or phenyl radicle, Y the methyl or phenyl radicle and Z represents OH or the grouping R1 and R2 standing for hydrogen, alkyl or cycloalkyl which dyestufis are water-soluble mostly reddish brown powders and dye the animal fibers very equal and bright reddish shades of the desired yellowish tinge.

2. The monoazodyestuff of the formula:

which dyestufi is when dry a reddish brown water-soluble powder and dyes wool from an acid bath bright scarlet shades of a good fastness to light and a good levelling power.

3. The monoazodyestuff of the formula:

which dyestufi is when dry a reddish brown water soluble powder and dyes wool from an acid bath yellowish red shades of a good fastness to light and a good levelling power.

4. The monoazodyestuff of the formula:

l I /H OH nz N N=N- I H: H: H3000 soln SOzH which is when dry a reddish brown water soluble powder and dyes wool and silk from an acid bath bright scarlet shades of a good fastness to light, washing and perspiration.

RICHARD FLEISCHHAUER. 

